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Table 3 Within-season average outdoor concentrations at homes and central-site monitor

From: Land use regression modeling of intra-urban residential variability in multiple traffic-related air pollutants

   Overall Summer Winter
Pollutant Location N Mean (SD) Median N Mean (SD) Median N Mean (SD) Median
PM 2.5 Outdoor 59 13.9 (5.0) 12.5 35 15.1 (5.7) 13.8 24 12.2 (3.1) 13.8
   (μg/m3) Central Site 59 15.4 (6.1) 14.6 35 17.0 (7.1) 14.9 24 13.1 (3.4) 12.9
EC Outdoor 58 0.52 (0.41) 0.46 34 0.51 (0.51) 0.39 24 0.54 (0.18) 0.56
   (μg/m3) Central Site 58 0.86 (0.34) 0.83 34 1.01 (0.31) 1.01 24 0.65 (0.27) 0.61
NO 2 Outdoor 52 17.2 (6.0) 16.8 36 17.7 (6.4) 17.3 16 16.3 (4.9) 15.5
   (ppb) Central Site 52 18.4 (3.9) 17.9 36 17.3 (3.5) 18.0 16 21.0 (3.4) 21.3